"Is only of" operator exposed filter

I have a problem in my views with exposed filters to taxonomy terms.

Nodes are linked to one or more taxonomy terms.
And I'm working for a wizard with views exposed terms.

This is an example:
- product 1 linked to terms: -smartphone -tablet
- product 2 linked to terms: -laptop -tablet -PC
- product 3 linked to terms: -tablet

I have an exposed filter with term:
- smartphone
- tablet
- laptop
- PC

When I set in my exposed widget term "tablet" the query shows product 1, product 2 and product 3.
I would like to have an operator "if only of" (or a trick with other operator) to obtain only results with only this term (and not product with multiple term linked).

for example:
When I set in my exposed widget term "tablet" the query shows only product 3.
If I set smartphone+tablet shows only product 1.

Thanks.